I have had the car for 2 days and I reset the codes once and these 3 came back up.

P0332HC - Knock sensor Circuit rear
V1064HC - Loss of communication with BCM
V1000HC - Loss of Comm. undetermined

All right I know the H means it’s happened in the past and the C is current, what I need is someone to explain to me what mean or better how to fix. I know that the knock sensor is probably a PIA, but what is the BCM.

Thanks for any help
David

 

Don't take my advise too seriously, but:

The BCM is the Body Control Module, it's the computer that controls things inside the car. You're having some kind of communication problem between the Modules.

Check the grounding connections up under the hood hinges for corrosion, and if you've got the factory batter cross your fingers and check to see if the terminals are leaking down the side of the battery. Judging from the time of year I don't think this will yield any results, but you can also check the passenger side floorboard and see if it's damp, the Evaporator drain sometimes gets clogged up and causes the water to go here. This is also where your BCM resides.

I'd wait for one of the experts to chime in though.

Luke

 

its a new bat, and I will check for loose ends under the hood

thanks

 

The V's you mention are most likely actuall U codes....
Anatomy of the DTC
A DTC is made up of 5 digits. The figure below demonstrates the composition of a DTC. With this information it is easier to trouble shoot a DTC without knowing the description of the code.



U1000 and U1255 Class 2 Communication Malfunction
U1001-U1254 Lost Communication with XXX
U1300, U1301, or U1305 Class 2 Data Link Shorted


U1064 would be a comm loss as would U1000
DTC U1000 or U1255 may set current or history, with or without other DTCs.

These DTCs set when the control module does not receive a message that it was expecting from another control module, and does not know which control module did not send the message.

If the DTC U1000 or U1255 is set in history with other DTCs set current or history, diagnose the other DTCs first.
If the DTC U1000 or U1255 is set current, this usually indicates a module that is currently not communicating or a configuration issue. For example, if the control module is configured for an option (i.e., OnStar, keyless entry, memory mirrors, etc.) that the vehicle does not have, it may expect to receive a message regarding this missing feature. This would usually occur due to the control module being recently replaced and incorrectly set up.
When the DTC U1000 or U1255 is current, the module that is not communicating may not even be listed on the Tech 2 on the Diagnostic Circuit Check /Class 2 Message Monitor list.
If the DTC U1000 or U1255 has set in history without other DTCs, replacing the control module that set the DTC is most likely NOT the solution. The module that has set the code is looking for an input from another module that is not communicating. Because the module did not receive an input that it is expecting to see, it sets a U1000 or U1255 which indicates there was a loss of communications. Look at the customer's concern (i.e., intermittent, erratic tachometer operation). This will probably be a better indication of the control module that is the source of the concern.